Procedure:
I open a Nikon RAW file (NEF, Nikon D850) with Raw-Converter 12.1.
Afterwards, unlike in a conversion with e.g. RAW 5.6, the Raw-filename is not listed in the Meta-section CAMERA RAW (Bridge 2020).

I have to keep thatin the META data - and not only as an original filename (that one can change and therefore loose the original filename).

Thanks for answering in advance.
Frank